<?php

/**
 * PHPTAL templating engine
 *
 * PHP Version 5
 *
 * @category HTML
 * @package  PHPTAL
 * @author   Laurent Bedubourg <lbedubourg@motion-twin.com>
 * @author   Kornel Lesiński <kornel@aardvarkmedia.co.uk>
 * @license  http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
 * @version  SVN: $Id$
 * @link     http://phptal.org/
 */

/**
 * i18n:domain
 *
 * The i18n:domain attribute is used to specify the domain to be used to get
 * the translation. If not specified, the translation services will use a
 * default domain. The value of the attribute is used directly; it is not
 * a TALES expression.
 *
 * @package PHPTAL
 * @subpackage Php.attribute.i18n
 */
class PHPTAL_Php_Attribute_I18N_Domain extends PHPTAL_Php_Attribute {

  public function before(PHPTAL_Php_CodeWriter $codewriter) {
    // ensure a domain stack exists or create it
    $codewriter->doIf('!isset($_i18n_domains)');
    $codewriter->pushCode('$_i18n_domains = array()');
    $codewriter->doEnd('if');

    $expression = $codewriter->interpolateTalesVarsInString($this->expression);

    // push current domain and use new domain
    $code = '$_i18n_domains[] = ' . $codewriter->getTranslatorReference() . '->useDomain(' . $expression . ')';
    $codewriter->pushCode($code);
  }

  public function after(PHPTAL_Php_CodeWriter $codewriter) {
    // restore domain
    $code = $codewriter->getTranslatorReference() . '->useDomain(array_pop($_i18n_domains))';
    $codewriter->pushCode($code);
  }

}
